# import copy
# dictionary = {"卷心菜":"cabbage","午餐": ["lunch", "nooning"]}
# dictionary1 = dictionary
# dictionary2 = dictionary.copy()
# dictionary3 = copy.deepcopy(dictionary)
# dictionary["卷心菜"] = "pamphrey"
# dictionary["午餐"].remove("nooning")
# print(dictionary)
# print(dictionary1)
# print(dictionary2)
# print(dictionary3)

# dictionary = {
#     "卷心菜": "cabbage",
#     "午餐": "lunch",
#     "机器人": "robot",
#     "天空": "sky",
#      "花": "flower"
# }
# print("中英文字典中所有中文词组及其对应的英文单词：")
# for item in dictionary.items():
#     print(item)
# print("中英文字典中所有中文词组：")
# for chinese in dictionary.keys():
#     print(chinese, end=" ")
# print("\n中英文字典中所有英文单词：")
# for english in dictionary.values():
#     print(english, end=" ")